| AbstractMessages | 
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| AvailableValues | 
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| CaseInsensitiveMap<V> | 
 An mapped collection where the keys are always strings and access to values is case-insensitive. 
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| CollectionFactory | 
 Static factory methods to ease the creation of new collection types (when using generics). 
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| CommonsUtils | 
 Some utility methods used in different Tapestry subprojects. 
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| ExceptionUtils | 
 Contains static methods useful for manipulating exceptions. 
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| IntegerRange | 
 Represents a sequence of integer values, either ascending or descending. 
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| MultiKey | 
 Combines multiple values to form a single composite key. 
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| Stack<E> | 
A simple, streamlined implementation of  Stack.  
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| StrategyRegistry<A> | 
 A key component in implementing the "Gang of Four" Strategy pattern. 
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| StringToEnumCoercion<T extends Enum> | 
A  Coercion for converting strings into an instance of a particular
 enumerated type.  
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| TimeInterval | 
 Used to represent a period of time, specifically as a configuration value. 
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